Traders who can usually explain the front, back and side of a deal fell silent when asked about the bank debt for Enron Corporation, currently the most notorious--and most confusing--credit in the market. When asked how much of the deal is secured and unsecured, a trader replied with a laugh, "If you can figure it out, you should become a credit officer." Another just waved the white flag of resignation. "It's too complicated for my simplified mind," he said.